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dioptrical
Variant of dioptric
adjective
- of optical lenses or the method of numbering them according to their refractive powers; dioptral
- of dioptrics; refractive
- helping the sight by refractive correction
Also dioptrical
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
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